Rendering a clip bugs out after the 10th minute

I have an original clip in mp4 format (H264 codec) that has a length of 25 minutes. It plays fine in VLC or Mplayer - no corruption.

I open this clip in Kdenlive, change the speed to 135% and render it. The resulting file is OK for the first 10 minutes, but then the remaining (approximately 9 minutes) are "empty". The remaining frames are actually only a copy of the first frame of the video (eg, no movement after the 10th minute; I can see only a single image).

The bug is reproducible, I tried a lot of things but it happens all the time. Can someone help me? Is there a way I can see the inigo logs?